There is no typical interview structure; it depends on the job and firm (size and sector of activity).
That said, it is quite possible that the person who is in charge of the interview will ask you some tricky questions, especially about the reasons why you left other jobs or former employers. Make sure you prepare in advance to answer such questions. You can always try out the answers with your family or friends. They should tell you honestly if your answers are convincing.
As a rule, if you are asked about a bad experience, always try to make the best out of it. Never be negative about former employers or colleagues. Counter the bad experience by giving several examples of things that worked out well.
To make a good impression on your potential future employer, remember to show a positive attitude, keep your head up and make eye contact with the person in charge of the interview.